linux-kernel - Re: [PATCH Resend] epoll: add EPOLLEXCLUSIVE support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAFLxGvx0m6iaDPTDkjzw6ohX6Wdmr+DgWEr_fMdyEux50JVFEw@mail.gmail.com>
Date:	Wed, 28 Mar 2012 16:09:24 +0200
From:	richard -rw- weinberger <richard.weinberger@...il.com>
To:	Hagen Paul Pfeifer <hagen@...u.net>
Cc:	torvalds@...ux-foundation.org, LKML <linux-kernel@...r.kernel.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Lucas De Marchi <lucas.demarchi@...fusion.mobi>,
	Andrew Morton <akpm@...ux-foundation.org>, jbaron@...hat.com,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH Resend] epoll: add EPOLLEXCLUSIVE support

On Wed, Mar 28, 2012 at 3:57 PM, Hagen Paul Pfeifer <hagen@...u.net> wrote:
> High performance server sometimes create one listening socket (e.g. port
> 80), create a epoll file descriptor and add the socket. Afterwards
> create SC_NPROCESSORS_ONLN threads and wait for events. This often
> result in a thundering herd problem because all CPUs are scheduled.
>
> This patch add an additional flag to epoll_ctl(2) called EPOLLEXCLUSIVE.
> If a descriptor is added with this flag only one CPU is scheduled in.
>
> Signed-off-by: Hagen Paul Pfeifer <hagen@...u.net>
> ---
> Dave rejected the patch and said not network specific. Because there
> is no epoll maintainer this time directly.

CC'ing maintainers for you...
Please use scripts/get_maintainer.pl.

-- 
Thanks,
//richard
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/